/**
* @license Copyright (c) 2003-2026, CKSource Holding sp. z o.o. All rights reserved.
* For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-licensing-options
*/
/**
* @module engine/view/domconverter
*/
import { ViewText } from "./text.js";
import { ViewElement } from "./element.js";
import { ViewUIElement } from "./uielement.js";
import { ViewPosition } from "./position.js";
import { ViewRange } from "./range.js";
import { ViewSelection } from "./selection.js";
import { ViewDocumentFragment } from "./documentfragment.js";
import { type MatcherPattern } from "./matcher.js";
import { type ViewNode } from "./node.js";
import { type ViewDocument } from "./document.js";
import { type ViewDocumentSelection } from "./documentselection.js";
import { type ViewEditableElement } from "./editableelement.js";
import { type ViewRawElement } from "./rawelement.js";
type DomNode = globalThis.Node;
type DomElement = globalThis.HTMLElement;
type DomDocument = globalThis.Document;
type DomDocumentFragment = globalThis.DocumentFragment;
type DomRange = globalThis.Range;
type DomText = globalThis.Text;
type DomSelection = globalThis.Selection;
/**
* `ViewDomConverter` is a set of tools to do transformations between DOM nodes and view nodes. It also handles
* {@link module:engine/view/domconverter~ViewDomConverter#bindElements bindings} between these nodes.
*
* An instance of the DOM converter is available under
* {@link module:engine/view/view~EditingView#domConverter `editor.editing.view.domConverter`}.
*
* The DOM converter does not check which nodes should be rendered (use {@link module:engine/view/renderer~ViewRenderer}), does not keep the
* state of a tree nor keeps the synchronization between the tree view and
* the DOM tree (use {@link module:engine/view/document~ViewDocument}).
*
* The DOM converter keeps DOM elements to view element bindings, so when the converter gets destroyed, the bindings are lost.
* Two converters will keep separate binding maps, so one tree view can be bound with two DOM trees.
*/
export declare class ViewDomConverter {
	readonly document: ViewDocument;
	/**
	* Whether to leave the View-to-DOM conversion result unchanged or improve editing experience by filtering out interactive data.
	*/
	readonly renderingMode: "data" | "editing";
	/**
	* The mode of a block filler used by the DOM converter.
	*/
	blockFillerMode: ViewBlockFillerMode;
	/**
	* Elements which are considered pre-formatted elements.
	*/
	readonly preElements: Array<string>;
	/**
	* Elements which are considered block elements (and hence should be filled with a
	* {@link #isBlockFiller block filler}).
	*
	* Whether an element is considered a block element also affects handling of trailing whitespaces.
	*
	* You can extend this array if you introduce support for block elements which are not yet recognized here.
	*/
	readonly blockElements: Array<string>;
	/**
	* A list of elements that exist inline (in text) but their inner structure cannot be edited because
	* of the way they are rendered by the browser. They are mostly HTML form elements but there are other
	* elements such as `<img>` or `<iframe>` that also have non-editable children or no children whatsoever.
	*
	* Whether an element is considered an inline object has an impact on white space rendering (trimming)
	* around (and inside of it). In short, white spaces in text nodes next to inline objects are not trimmed.
	*
	* You can extend this array if you introduce support for inline object elements which are not yet recognized here.
	*/
	readonly inlineObjectElements: Array<string>;
	/**
	* A list of elements which may affect the editing experience. To avoid this, those elements are replaced with
	* `<span data-ck-unsafe-element="[element name]"></span>` while rendering in the editing mode.
	*/
	readonly unsafeElements: Array<string>;
	/**
	* The DOM Document used by `ViewDomConverter` to create DOM nodes.
	*/
	private readonly _domDocument;
	/**
	* The DOM-to-view mapping.
	*/
	private readonly _domToViewMapping;
	/**
	* The view-to-DOM mapping.
	*/
	private readonly _viewToDomMapping;
	/**
	* Holds the mapping between fake selection containers and corresponding view selections.
	*/
	private readonly _fakeSelectionMapping;
	/**
	* Matcher for view elements whose content should be treated as raw data
	* and not processed during the conversion from DOM nodes to view elements.
	*/
	private readonly _rawContentElementMatcher;
	/**
	* Matcher for inline object view elements. This is an extension of a simple {@link #inlineObjectElements} array of element names.
	*/
	private readonly _inlineObjectElementMatcher;
	/**
	* Set of elements with temporary custom properties that require clearing after render.
	*/
	private readonly _elementsWithTemporaryCustomProperties;
	/**
	* Creates a DOM converter.
	*
	* @param document The view document instance.
	* @param options An object with configuration options.
	* @param options.blockFillerMode The type of the block filler to use.
	* Default value depends on the options.renderingMode:
	*  'nbsp' when options.renderingMode == 'data',
	*  'br' when options.renderingMode == 'editing'.
	* @param options.renderingMode Whether to leave the View-to-DOM conversion result unchanged
	* or improve editing experience by filtering out interactive data.
	*/
	constructor(document: ViewDocument, { blockFillerMode, renderingMode }?: {
		blockFillerMode?: ViewBlockFillerMode;
		renderingMode?: "data" | "editing";
	});
	/**
	* The DOM Document used by `ViewDomConverter` to create DOM nodes.
	*/
	get domDocument(): DomDocument;
	/**
	* Binds a given DOM element that represents fake selection to a **position** of a
	* {@link module:engine/view/documentselection~ViewDocumentSelection document selection}.
	* Document selection copy is stored and can be retrieved by the
	* {@link module:engine/view/domconverter~ViewDomConverter#fakeSelectionToView} method.
	*/
	bindFakeSelection(domElement: DomElement, viewDocumentSelection: ViewDocumentSelection): void;
	/**
	* Returns a {@link module:engine/view/selection~ViewSelection view selection} instance corresponding to a given
	* DOM element that represents fake selection. Returns `undefined` if binding to the given DOM element does not exist.
	*/
	fakeSelectionToView(domElement: DomElement): ViewSelection | undefined;
	/**
	* Binds DOM and view elements, so it will be possible to get corresponding elements using
	* {@link module:engine/view/domconverter~ViewDomConverter#mapDomToView} and
	* {@link module:engine/view/domconverter~ViewDomConverter#mapViewToDom}.
	*
	* @param domElement The DOM element to bind.
	* @param viewElement The view element to bind.
	*/
	bindElements(domElement: DomElement, viewElement: ViewElement): void;
	/**
	* Unbinds a given DOM element from the view element it was bound to. Unbinding is deep, meaning that all children of
	* the DOM element will be unbound too.
	*
	* @param domElement The DOM element to unbind.
	*/
	unbindDomElement(domElement: DomElement): void;
	/**
	* Binds DOM and view document fragments, so it will be possible to get corresponding document fragments using
	* {@link module:engine/view/domconverter~ViewDomConverter#mapDomToView} and
	* {@link module:engine/view/domconverter~ViewDomConverter#mapViewToDom}.
	*
	* @param domFragment The DOM document fragment to bind.
	* @param viewFragment The view document fragment to bind.
	*/
	bindDocumentFragments(domFragment: DomDocumentFragment, viewFragment: ViewDocumentFragment): void;
	/**
	* Decides whether a given pair of attribute key and value should be passed further down the pipeline.
	*
	* @param elementName Element name in lower case.
	*/
	shouldRenderAttribute(attributeKey: string, attributeValue: string, elementName: string): boolean;
	/**
	* Set `domElement`'s content using provided `html` argument. Apply necessary filtering for the editing pipeline.
	*
	* @param domElement DOM element that should have `html` set as its content.
	* @param html Textual representation of the HTML that will be set on `domElement`.
	*/
	setContentOf(domElement: DomElement, html: string): void;
	viewToDom(viewNode: ViewText, options?: {
		bind?: boolean;
		withChildren?: boolean;
	}): DomText;
	viewToDom(viewNode: ViewElement, options?: {
		bind?: boolean;
		withChildren?: boolean;
	}): DomElement;
	viewToDom(viewNode: ViewNode, options?: {
		bind?: boolean;
		withChildren?: boolean;
	}): DomNode;
	viewToDom(viewNode: ViewDocumentFragment, options?: {
		bind?: boolean;
		withChildren?: boolean;
	}): DomDocumentFragment;
	/**
	* Sets the attribute on a DOM element.
	*
	* **Note**: To remove the attribute, use {@link #removeDomElementAttribute}.
	*
	* @param domElement The DOM element the attribute should be set on.
	* @param key The name of the attribute.
	* @param value The value of the attribute.
	* @param relatedViewElement The view element related to the `domElement` (if there is any).
	* It helps decide whether the attribute set is unsafe. For instance, view elements created via the
	* {@link module:engine/view/downcastwriter~ViewDowncastWriter} methods can allow certain attributes
	* that would normally be filtered out.
	*/
	setDomElementAttribute(domElement: DomElement, key: string, value: string, relatedViewElement?: ViewElement): void;
	/**
	* Removes an attribute from a DOM element.
	*
	* **Note**: To set the attribute, use {@link #setDomElementAttribute}.
	*
	* @param domElement The DOM element the attribute should be removed from.
	* @param key The name of the attribute.
	*/
	removeDomElementAttribute(domElement: DomElement, key: string): void;
	/**
	* Converts children of the view element to DOM using the
	* {@link module:engine/view/domconverter~ViewDomConverter#viewToDom} method.
	* Additionally, this method adds block {@link module:engine/view/filler filler} to the list of children, if needed.
	*
	* @param viewElement Parent view element.
	* @param options See {@link module:engine/view/domconverter~ViewDomConverter#viewToDom} options parameter.
	* @returns DOM nodes.
	*/
	viewChildrenToDom(viewElement: ViewElement | ViewDocumentFragment, options?: {
		bind?: boolean;
		withChildren?: boolean;
	}): IterableIterator<Node>;
	/**
	* Converts view {@link module:engine/view/range~ViewRange} to DOM range.
	* Inline and block {@link module:engine/view/filler fillers} are handled during the conversion.
	*
	* @param viewRange View range.
	* @returns DOM range.
	*/
	viewRangeToDom(viewRange: ViewRange): DomRange;
	/**
	* Converts view {@link module:engine/view/position~ViewPosition} to DOM parent and offset.
	*
	* Inline and block {@link module:engine/view/filler fillers} are handled during the conversion.
	* If the converted position is directly before inline filler it is moved inside the filler.
	*
	* @param viewPosition View position.
	* @returns DOM position or `null` if view position could not be converted to DOM.
	* DOM position has two properties:
	* * `parent` - DOM position parent.
	* * `offset` - DOM position offset.
	*/
	viewPositionToDom(viewPosition: ViewPosition): {
		parent: DomNode;
		offset: number;
	} | null;
	/**
	* Converts DOM to view. For all text nodes, not bound elements and document fragments new items will
	* be created. For bound elements and document fragments function will return corresponding items. For
	* {@link module:engine/view/filler fillers} `null` will be returned.
	* For all DOM elements rendered by {@link module:engine/view/uielement~ViewUIElement} that UIElement will be returned.
	*
	* @param domNode DOM node or document fragment to transform.
	* @param options Conversion options.
	* @param options.bind Determines whether new elements will be bound. False by default.
	* @param options.withChildren If `true`, node's and document fragment's children will be converted too. True by default.
	* @param options.keepOriginalCase If `false`, node's tag name will be converted to lower case. False by default.
	* @param options.skipComments If `false`, comment nodes will be converted to `$comment`
	* {@link module:engine/view/uielement~ViewUIElement view UI elements}. False by default.
	* @returns Converted node or document fragment or `null` if DOM node is a {@link module:engine/view/filler filler}
	* or the given node is an empty text node.
	*/
	domToView(domNode: DomNode, options?: {
		bind?: boolean;
		withChildren?: boolean;
		keepOriginalCase?: boolean;
		skipComments?: boolean;
	}): ViewNode | ViewDocumentFragment | null;
	/**
	* Converts children of the DOM element to view nodes using
	* the {@link module:engine/view/domconverter~ViewDomConverter#domToView} method.
	* Additionally this method omits block {@link module:engine/view/filler filler}, if it exists in the DOM parent.
	*
	* @param domElement Parent DOM element.
	* @param options See {@link module:engine/view/domconverter~ViewDomConverter#domToView} options parameter.
	* @param inlineNodes An array that will be populated with inline nodes. It's used internally for whitespace processing.
	* @returns View nodes.
	*/
	domChildrenToView(domElement: DomElement, options?: Parameters<ViewDomConverter["domToView"]>[1], inlineNodes?: Array<ViewNode>): IterableIterator<ViewNode>;
	/**
	* Converts DOM selection to view {@link module:engine/view/selection~ViewSelection}.
	* Ranges which cannot be converted will be omitted.
	*
	* @param domSelection DOM selection.
	* @returns View selection.
	*/
	domSelectionToView(domSelection: DomSelection): ViewSelection;
	/**
	* Converts DOM Range to view {@link module:engine/view/range~ViewRange}.
	* If the start or end position cannot be converted `null` is returned.
	*
	* @param domRange DOM range.
	* @returns View range.
	*/
	domRangeToView(domRange: DomRange | StaticRange): ViewRange | null;
	/**
	* Converts DOM parent and offset to view {@link module:engine/view/position~ViewPosition}.
	*
	* If the position is inside a {@link module:engine/view/filler filler} which has no corresponding view node,
	* position of the filler will be converted and returned.
	*
	* If the position is inside DOM element rendered by {@link module:engine/view/uielement~ViewUIElement}
	* that position will be converted to view position before that UIElement.
	*
	* If structures are too different and it is not possible to find corresponding position then `null` will be returned.
	*
	* @param domParent DOM position parent.
	* @param domOffset DOM position offset. You can skip it when converting the inline filler node.
	* @returns View position.
	*/
	domPositionToView(domParent: DomNode, domOffset?: number): ViewPosition | null;
	/**
	* Returns corresponding view {@link module:engine/view/element~ViewElement Element} or
	* {@link module:engine/view/documentfragment~ViewDocumentFragment} for provided DOM element or
	* document fragment. If there is no view item {@link module:engine/view/domconverter~ViewDomConverter#bindElements bound}
	* to the given DOM - `undefined` is returned.
	*
	* For all DOM elements rendered by a {@link module:engine/view/uielement~ViewUIElement} or
	* a {@link module:engine/view/rawelement~ViewRawElement}, the parent `UIElement` or `RawElement` will be returned.
	*
	* @param domElementOrDocumentFragment DOM element or document fragment.
	* @returns Corresponding view element, document fragment or `undefined` if no element was bound.
	*/
	mapDomToView(domElementOrDocumentFragment: DomElement | DomDocumentFragment): ViewElement | ViewDocumentFragment | undefined;
	/**
	* Finds corresponding text node. Text nodes are not {@link module:engine/view/domconverter~ViewDomConverter#bindElements bound},
	* corresponding text node is returned based on the sibling or parent.
	*
	* If the directly previous sibling is a {@link module:engine/view/domconverter~ViewDomConverter#bindElements bound} element, it is used
	* to find the corresponding text node.
	*
	* If this is a first child in the parent and the parent is a
	* {@link module:engine/view/domconverter~ViewDomConverter#bindElements bound}
	* element, it is used to find the corresponding text node.
	*
	* For all text nodes rendered by a {@link module:engine/view/uielement~ViewUIElement} or
	* a {@link module:engine/view/rawelement~ViewRawElement}, the parent `UIElement` or `RawElement` will be returned.
	*
	* Otherwise `null` is returned.
	*
	* Note that for the block or inline {@link module:engine/view/filler filler} this method returns `null`.
	*
	* @param domText DOM text node.
	* @returns Corresponding view text node or `null`, if it was not possible to find a corresponding node.
	*/
	findCorrespondingViewText(domText: DomText): ViewText | ViewUIElement | ViewRawElement | null;
	/**
	* Returns corresponding DOM item for provided {@link module:engine/view/element~ViewElement Element} or
	* {@link module:engine/view/documentfragment~ViewDocumentFragment DocumentFragment}.
	* To find a corresponding text for {@link module:engine/view/text~ViewText view Text instance}
	* use {@link #findCorrespondingDomText}.
	*
	* @label ELEMENT
	* @param element View element or document fragment.
	* @returns Corresponding DOM node or document fragment.
	*/
	mapViewToDom(element: ViewElement): DomElement | undefined;
	/**
	* Returns corresponding DOM item for provided {@link module:engine/view/element~ViewElement Element} or
	* {@link module:engine/view/documentfragment~ViewDocumentFragment DocumentFragment}.
	* To find a corresponding text for {@link module:engine/view/text~ViewText view Text instance}
	* use {@link #findCorrespondingDomText}.
	*
	* @label DOCUMENT_FRAGMENT
	* @param documentFragment View element or document fragment.
	* @returns Corresponding DOM node or document fragment.
	*/
	mapViewToDom(documentFragment: ViewDocumentFragment): DomDocumentFragment | undefined;
	/**
	* Returns corresponding DOM item for provided {@link module:engine/view/element~ViewElement Element} or
	* {@link module:engine/view/documentfragment~ViewDocumentFragment DocumentFragment}.
	* To find a corresponding text for {@link module:engine/view/text~ViewText view Text instance}
	* use {@link #findCorrespondingDomText}.
	*
	* @label DOCUMENT_FRAGMENT_OR_ELEMENT
	* @param documentFragmentOrElement View element or document fragment.
	* @returns Corresponding DOM node or document fragment.
	*/
	mapViewToDom(documentFragmentOrElement: ViewElement | ViewDocumentFragment): DomElement | DomDocumentFragment | undefined;
	/**
	* Finds corresponding text node. Text nodes are not {@link module:engine/view/domconverter~ViewDomConverter#bindElements bound},
	* corresponding text node is returned based on the sibling or parent.
	*
	* If the directly previous sibling is a {@link module:engine/view/domconverter~ViewDomConverter#bindElements bound} element, it is used
	* to find the corresponding text node.
	*
	* If this is a first child in the parent and the parent is a
	* {@link module:engine/view/domconverter~ViewDomConverter#bindElements bound}
	* element, it is used to find the corresponding text node.
	*
	* Otherwise `null` is returned.
	*
	* @param viewText View text node.
	* @returns Corresponding DOM text node or `null`, if it was not possible to find a corresponding node.
	*/
	findCorrespondingDomText(viewText: ViewText): DomText | null;
	/**
	* Focuses DOM editable that is corresponding to provided {@link module:engine/view/editableelement~ViewEditableElement}.
	*/
	focus(viewEditable: ViewEditableElement): void;
	/**
	* Remove DOM selection from blurred editable, so it won't interfere with clicking on dropdowns (especially on iOS).
	*
	* @internal
	*/
	_clearDomSelection(): void;
	/**
	* Returns `true` when `node.nodeType` equals `Node.ELEMENT_NODE`.
	*
	* @param node Node to check.
	*/
	isElement(node: DomNode): node is DomElement;
	/**
	* Returns `true` when `node.nodeType` equals `Node.DOCUMENT_FRAGMENT_NODE`.
	*
	* @param node Node to check.
	*/
	isDocumentFragment(node: DomNode): node is DomDocumentFragment;
	/**
	* Checks if the node is an instance of the block filler for this DOM converter.
	*
	* ```ts
	* const converter = new ViewDomConverter( viewDocument, { blockFillerMode: 'br' } );
	*
	* converter.isBlockFiller( BR_FILLER( document ) ); // true
	* converter.isBlockFiller( NBSP_FILLER( document ) ); // false
	* ```
	*
	* **Note:**: For the `'nbsp'` mode the method also checks context of a node so it cannot be a detached node.
	*
	* **Note:** A special case in the `'nbsp'` mode exists where the `<br>` in `<p><br></p>` is treated as a block filler.
	*
	* @param domNode DOM node to check.
	* @returns True if a node is considered a block filler for given mode.
	*/
	isBlockFiller(domNode: DomNode): boolean;
	/**
	* Returns `true` if given selection is a backward selection, that is, if it's `focus` is before `anchor`.
	*
	* @param selection Selection instance to check.
	*/
	isDomSelectionBackward(selection: DomSelection): boolean;
	/**
	* Returns a parent {@link module:engine/view/uielement~ViewUIElement} or {@link module:engine/view/rawelement~ViewRawElement}
	* that hosts the provided DOM node. Returns `null` if there is no such parent.
	*/
	getHostViewElement(domNode: DomNode): ViewUIElement | ViewRawElement | null;
	/**
	* Checks if the given selection's boundaries are at correct places.
	*
	* The following places are considered as incorrect for selection boundaries:
	*
	* * before or in the middle of an inline filler sequence,
	* * inside a DOM element which represents {@link module:engine/view/uielement~ViewUIElement a view UI element},
	* * inside a DOM element which represents {@link module:engine/view/rawelement~ViewRawElement a view raw element}.
	*
	* @param domSelection The DOM selection object to be checked.
	* @returns `true` if the given selection is at a correct place, `false` otherwise.
	*/
	isDomSelectionCorrect(domSelection: DomSelection): boolean;
	/**
	* Registers a {@link module:engine/view/matcher~MatcherPattern} for view elements whose content should be treated as raw data
	* and not processed during the conversion from DOM nodes to view elements.
	*
	* This is affecting how {@link module:engine/view/domconverter~ViewDomConverter#domToView} and
	* {@link module:engine/view/domconverter~ViewDomConverter#domChildrenToView} process DOM nodes.
	*
	* The raw data can be later accessed by a
	* {@link module:engine/view/element~ViewElement#getCustomProperty custom property of a view element} called `"$rawContent"`.
	*
	* @param pattern Pattern matching a view element whose content should
	* be treated as raw data.
	*/
	registerRawContentMatcher(pattern: MatcherPattern): void;
	/**
	* Registers a {@link module:engine/view/matcher~MatcherPattern} for inline object view elements.
	*
	* This is affecting how {@link module:engine/view/domconverter~ViewDomConverter#domToView} and
	* {@link module:engine/view/domconverter~ViewDomConverter#domChildrenToView} process DOM nodes.
	*
	* This is an extension of a simple {@link #inlineObjectElements} array of element names.
	*
	* @param pattern Pattern matching a view element which should be treated as an inline object.
	*/
	registerInlineObjectMatcher(pattern: MatcherPattern): void;
	/**
	* Clear temporary custom properties.
	*
	* @internal
	*/
	_clearTemporaryCustomProperties(): void;
	/**
	* Returns the block {@link module:engine/view/filler filler} node based on the current {@link #blockFillerMode} setting.
	*/
	private _getBlockFiller;
	/**
	* Checks if the given DOM position is a correct place for selection boundary. See {@link #isDomSelectionCorrect}.
	*
	* @param domParent Position parent.
	* @param offset Position offset.
	* @returns `true` if given position is at a correct place for selection boundary, `false` otherwise.
	*/
	private _isDomSelectionPositionCorrect;
	/**
	* Internal generator for {@link #domToView}. Also used by {@link #domChildrenToView}.
	* Separates DOM nodes conversion from whitespaces processing.
	*
	* @param domNode DOM node or document fragment to transform.
	* @param inlineNodes An array of recently encountered inline nodes truncated to the block element boundaries.
	* Used later to process whitespaces.
	*/
	private _domToView;
	/**
	* Internal helper that walks the list of inline view nodes already generated from DOM nodes
	* and handles whitespaces and NBSPs.
	*
	* @param domParent The DOM parent of the given inline nodes. This should be a document fragment or
	* a block element to whitespace processing start cleaning.
	* @param inlineNodes An array of recently encountered inline nodes truncated to the block element boundaries.
	*/
	private _processDomInlineNodes;
	/**
	* Takes text data from a given {@link module:engine/view/text~ViewText#data} and processes it so
	* it is correctly displayed in the DOM.
	*
	* Following changes are done:
	*
	* * a space at the beginning is changed to `&nbsp;` if this is the first text node in its container
	* element or if a previous text node ends with a space character,
	* * space at the end of the text node is changed to `&nbsp;` if there are two spaces at the end of a node or if next node
	* starts with a space or if it is the last text node in its container,
	* * remaining spaces are replaced to a chain of spaces and `&nbsp;` (e.g. `'x   x'` becomes `'x &nbsp; x'`).
	*
	* Content of {@link #preElements} is not processed.
	*
	* @param node View text node to process.
	* @returns Processed text data.
	*/
	private _processDataFromViewText;
	/**
	* Checks whether given node ends with a space character after changing appropriate space characters to `&nbsp;`s.
	*
	* @param  node Node to check.
	* @returns `true` if given `node` ends with space, `false` otherwise.
	*/
	private _nodeEndsWithSpace;
	/**
	* Checks whether given text contains preformatted white space. This is the case if
	* * any of node ancestors has a name which is in `preElements` array, or
	* * the closest ancestor that has the `white-space` CSS property sets it to a value that preserves spaces
	*
	* @param node Node to check
	* @returns `true` if given node contains preformatted white space, `false` otherwise.
	*/
	private _isPreFormatted;
	/**
	* Helper function. For given {@link module:engine/view/text~ViewText view text node}, it finds previous or next sibling
	* that is contained in the same container element. If there is no such sibling, `null` is returned.
	*
	* @param node Reference node.
	* @returns Touching text node, an inline object
	* or `null` if there is no next or previous touching text node.
	*/
	private _getTouchingInlineViewNode;
	/**
	* Returns `true` if a DOM node belongs to {@link #blockElements}. `false` otherwise.
	*/
	private _isBlockDomElement;
	/**
	* Returns `true` if a view node belongs to {@link #blockElements}. `false` otherwise.
	*/
	private _isBlockViewElement;
	/**
	* Returns `true` if a DOM node belongs to {@link #inlineObjectElements}. `false` otherwise.
	*/
	private _isInlineObjectElement;
	/**
	* Creates view element basing on the node type.
	*
	* @param node DOM node to check.
	* @param options Conversion options. See {@link module:engine/view/domconverter~ViewDomConverter#domToView} options parameter.
	*/
	private _createViewElement;
	/**
	* Checks if view element's content should be treated as a raw data.
	*
	* @param viewElement View element to check.
	* @param options Conversion options. See {@link module:engine/view/domconverter~ViewDomConverter#domToView} options parameter.
	*/
	private _isViewElementWithRawContent;
	/**
	* Checks whether a given element name should be renamed in a current rendering mode.
	*
	* @param elementName The name of view element.
	*/
	private _shouldRenameElement;
	/**
	* Return a <span> element with a special attribute holding the name of the original element.
	* Optionally, copy all the attributes of the original element if that element is provided.
	*
	* @param elementName The name of view element.
	* @param originalDomElement The original DOM element to copy attributes and content from.
	*/
	private _createReplacementDomElement;
}
/**
* Enum representing the type of the block filler.
*
* Possible values:
*
* * `br` &ndash; For the `<br data-cke-filler="true">` block filler used in the editing view.
* * `nbsp` &ndash; For the `&nbsp;` block fillers used in the data.
* * `markedNbsp` &ndash; For the `&nbsp;` block fillers wrapped in `<span>` elements: `<span data-cke-filler="true">&nbsp;</span>`
* used in the data.
*/
export type ViewBlockFillerMode = "br" | "nbsp" | "markedNbsp";
export {};